Timing Spatial Conflict within the Parietal Cortex: A TMS Study

Orienting and motor attention are known to recruit different regions within right and left parietal lobes. However, the time course and the role played by these modules when visual information competes for different motor response are still unknown. To deal with this issue, single-pulse TMS was appl...

Full description

Saved in:
Bibliographic Details
Published in:Journal of cognitive neuroscience 2011-12, Vol.23 (12), p.3998-4007
Main Authors: Schiff, Sami, Bardi, Lara, Basso, Demis, Mapelli, Daniela
Format: Article
Language:English
Subjects:
Adult
Brain
Conflict (Psychology)
Humans
Motor ability
Neurosciences
Parietal Lobe - physiology
Psychomotor Performance - physiology
Reaction Time - physiology
Space Perception - physiology
Time Factors
Transcranial Magnetic Stimulation - methods
Visual task performance
Young Adult
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Orienting and motor attention are known to recruit different regions within right and left parietal lobes. However, the time course and the role played by these modules when visual information competes for different motor response are still unknown. To deal with this issue, single-pulse TMS was applied over the angular (AG) and the supramarginal (SMG) gyri of both hemispheres at several time intervals during the execution of a Simon task. Suppression of the conflict between stimulus and response positions (i.e., the Simon effect) was found when TMS pulse was applied 130 msec after stimulus onset over the right AG and after 160 msec when applied over the left AG and SMG. Interestingly, only stimulation of the left SMG suppressed the asymmetry in conflict magnitude between left- and right-hand responses, usually observed in the Simon task. The present data show that orienting attention and motor attention processes are temporally, functionally, and spatially separated in the posterior parietal cortex, and both contribute to prime motor response during spatial conflict.
ISSN:0898-929X
1530-8898
DOI:10.1162/jocn_a_00080